Wiper amplifier

[Solo_S14]

Wondering if any of you guys would be able to answer this.
I'm starting to re-assemble right now, and I've got a question about my wiper amplifier. It's the part located behind the passenger strut tower, tucked behind the ABS block.

Coming off of the amplifier is a plug and a vacuum line.
The vacuum line is plugged with a screw on mine, and I'm wondering if this is doing anything while plugged off?

Does it just act as an electrical amplifier through the plug, or does it need a vacuum signal to work?

Thanks.

- JC

[Solo_S14]

This is what I'm talking about:

[CodyAce]

That's the Cruise Control 'brain', nothing to do with the wipers

[Solo_S14]

Oh really, I was going by this diagram in the FSM to figure out what it was.




Best I can tell, I didn't have anything else back there.
The wiper amplifier is what allows it to work on intermittent, so where would I find it?

[WilloW]

That is not the wiper amp on the S14. The wiper amp is simply a black, square plastic box with a plug.